From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#13690: 24.3.50; scroll-conservatively and Info-up Date: Wed, 13 Feb 2013 06:02:34 +0200 Message-ID: <83txpg509x.fsf@gnu.org> References: <87sj52juwu.fsf@rosalinde.fritz.box> <834nhh5x1y.fsf@gnu.org> <87ip5xp4yv.fsf@rosalinde.fritz.box> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1360728162 17203 80.91.229.3 (13 Feb 2013 04:02:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 13 Feb 2013 04:02:42 +0000 (UTC) Cc: 13690@debbugs.gnu.org To: Stephen Berman Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Feb 13 05:03:02 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1U5TYg-0003rn-Uj for geb-bug-gnu-emacs@m.gmane.org; Wed, 13 Feb 2013 05:02:59 +0100 Original-Received: from localhost ([::1]:60399 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U5TYN-0002II-HX for geb-bug-gnu-emacs@m.gmane.org; Tue, 12 Feb 2013 23:02:39 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:42264) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U5TYI-0002HZ-WC for bug-gnu-emacs@gnu.org; Tue, 12 Feb 2013 23:02:38 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U5TYH-0008Ix-4E for bug-gnu-emacs@gnu.org; Tue, 12 Feb 2013 23:02:34 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:47556) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U5TYG-0008Ir-V8 for bug-gnu-emacs@gnu.org; Tue, 12 Feb 2013 23:02:33 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1U5TYj-0005km-O4 for bug-gnu-emacs@gnu.org; Tue, 12 Feb 2013 23:03:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 13 Feb 2013 04:03:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 13690 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 13690-submit@debbugs.gnu.org id=B13690.136072817722102 (code B ref 13690); Wed, 13 Feb 2013 04:03:01 +0000 Original-Received: (at 13690) by debbugs.gnu.org; 13 Feb 2013 04:02:57 +0000 Original-Received: from localhost ([127.0.0.1]:53020 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1U5TYe-0005kQ-Lb for submit@debbugs.gnu.org; Tue, 12 Feb 2013 23:02:57 -0500 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:36971) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1U5TYa-0005kE-Ir for 13690@debbugs.gnu.org; Tue, 12 Feb 2013 23:02:54 -0500 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0MI500K004EEKI00@a-mtaout20.012.net.il> for 13690@debbugs.gnu.org; Wed, 13 Feb 2013 06:02:22 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MI500K214JXH160@a-mtaout20.012.net.il>; Wed, 13 Feb 2013 06:02:22 +0200 (IST) In-reply-to: <87ip5xp4yv.fsf@rosalinde.fritz.box> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:71139 Archived-At: > From: Stephen Berman > Cc: 13690@debbugs.gnu.org > Date: Tue, 12 Feb 2013 23:00:56 +0100 > > > Scroll up to this many lines, to bring point back on screen. > > If point moves off-screen, redisplay will scroll by up to > > `scroll-conservatively' lines in order to bring point just barely > > onto the screen again. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > ^^^^^^^^^^^^^^^^^^^^^ > > > > And this is what happens in the use case you describe. So I'm unsure > > why you regard this a bug. What did you expect instead, and why? > > I expected to see the whole node, or at least as much as possible while > keeping the target line in view. I expect this because to all > appearances Info-up, like the other Info node navigation commands, is a > jumping (or zapping, warping, i.e. movement in one fell swoop), not a > scrolling, operation. scroll-conservatively affects _any_ movement within a buffer, not just to scrolling commands. This is by popular demand; you can find my questions about this and answers by others a year or two ago in the archives. E.g., scroll-conservatively affects commands such as goto-char, even if you move far away in the buffer. > I see that scroll_conservatively is only used in redisplay_window. > Does calling Fnarrow_to_region entail calling redisplay_window? redisplay_window is the workhorse of the display engine in GUI sessions. It is called for _any_ kind of redisplay of any window. Narrowing only requires redisplay if it affects the portion of the buffer shown in the window. > > In general, setting scroll-conservatively to 1 tells Emacs that you > > are prepared to see as little as 1 line of context. > > But again, as a user, I'd expect this only if what I'm doing > recognizably involves scrolling, which Info-up does not, from the user's > point of view. Alas, other users' expectations are different. > Anyway, if you (and the other Emacs maintainers) agree with my > arguments, would it be acceptable to add a call to recenter at the end > of Info-up? I don't mind. But if you want that, why do you set scroll-conservatively to a non-nil value at all?